Dendritic growth of the binary succinonitrile-camphor system

Abstract

Succinonitrile (SCN)-2wt% Camphor (CAMP) alloy was unidirectionally solidified with a constant temperature gradient (G=3.01 K/mm) at different growth rates (V=6.5- 113 mu m/s) and with a constant growth rate (V=6.5 mu m/s) at different temperature gradients (G=1.93- 3.01 K/mm). Microstructural parameters (primary dendrite arm spacings, lambda(1), secondary dendrite arm spacings, lambda(2), dendrite tip radius, R, and mushy zone depth, d) were measured as a function of growth rate and temperature gradient. The experimental results have been compared with theoretical models and previous experimental works. The stability constant (sigma) for this alloy system was calculated and compared with similar experimental results.